package string;
/**
 *String和StringBuilder的对比
 */
public class StringStringBuilderDemo {
    public static void main(String[] args) {
        /*
        //String不适合频繁修改内容(效率低)
        String s="a";
        for(int i=0;i<10000000;i++){
            s=s+i;
        }
        System.out.println("执行完毕!");

         */
        StringBuilder s=new StringBuilder("a");
        for(int i=0;i<10000000;i++){
           s.append(i);
        }
        System.out.println("执行完毕!");



    }
}
